Perhaps I misunderstood, but it seems more likely that WTO has changed
registers and affected the processing of the exit. Obvious candidates are
condition code and  regs 0,1,15 (I can't remember whether R0 is used).

Are you using MF=(E, PARMLIST)?

Time for a test module to run the edit where you can debug it interactively?

Rupert

On Fri, 8 Nov 2019, 20:29 scott Ford, <idfli...@gmail.com> wrote:

> All:
>
> I have a bit of an issue I am trying to resolve in Assembler. We use a
> skeleton exit from another vendor and it has been working fine.
> It is re-entrant and keep seeing normal WTO's , i.e. ;  WTO
> 'XXXXX',ROUTCDE=11 , are not appearing on SYSLOG. We are using the
> WTOS to track through the flow of the exit. Could what i am seeing the exit
> being re-entrant and since WTO's use R1 that R1 is being destroyed by
> some task  ??
>
> Scott
>
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